524. Longest Word in Dictionary through Deleting【Medium】【删除后得到的字典中的最长单词】

Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the given string. If there are more than one possible results, return the longest word with the smallest lexicographical order. If there is no possible result, return the empty string.

Example 1:

Input:
s = "abpcplea", d = ["ale","apple","monkey","plea"]

Output: 
"apple"

Example 2:

Input:
s = "abpcplea", d = ["a","b","c"]

Output: 
"a"

Note:

1. All the strings in the input will only contain lower-case letters.
2. The size of the dictionary won't exceed 1,000.
3. The length of all the strings in the input won't exceed 1,000.

Accepted

37,941

Submissions

84,285

 

class Solution {
   public String findLongestWord(String s, List<String> d) {
    String res = "";
    for(String str: d){
            if(check(s, str) && (str.length() > res.length() 
                              || str.length() == res.length() && res.compareTo(str) > 0 ))
                res = str;
        }
        return res;
    }
   private boolean check(String s, String str) {
       int j = 0;
       for(int i = 0; i < s.length() && j < str.length(); i++) {
           if(s.charAt(i) == str.charAt(j)) {
               j++;
           }
       }
       return j == str.length();
   }
}